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Routing differential pair with same length

TMCCANN
I am trying to route a differential pair, but I am having trouble making each trace the same length. Is there an easy way to do this in allegro?
  • TMCCANN

    Yes, that's what I thought. I will just have to rearrange the components or figure it out.

     Thanks!! 

  • Robert Finley

     What causes the requirement for both sides of a diff pair to be of equal length?  I've never had a respected SI engineer show concern about a 5mm length difference under 10gHz.

    Discussions of PCI-E 2.0 and 3.0 SI techniques focus on obtaining uniform dielectric properties along both nets.  No mention of matching lengths on the pair.

     
  • OLY29
    As you are routing the traces if you do a right mouse click you can select single mode and then only route one trace at a time to get them both the same length.
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